Develop download system with ASP, NET
Front interface part
Main interface
The main interface is a TreeView control to add classification information.
The main interface is that the lower left part is a list control to display the download information list.
The main interface is the right part is a DataGrid control to display download information.
This is a basic interface. If you need more features, please expand your own!
Steps: Create a new project (select the ASP.NET application), add a web reference, renamed to Downws
Add a DataGrid on the form, set its properties with the property generator: column, pagination, format, etc., then set the data source for the DataGrid in the code, then bind, rendering the above style.
Add TreeView, List and other controls. Add data to TreeView in the program, please see below:
Note:
Internet Explorer WebControls not standard VS.NET Server Control, the site is downloaded to Microsoft: http:? //Msdn.microsoft.com/downloads/samples/internet/default.asp url = / Downloads / samples / Internet / ASP_DOT_NET_ServerControls / WebControls / default.asp Download the first time after installation, right-click the toolbox Customize Toolbox ... → .NET Framework Components to find microsoft.web.ui.webcontrols.treeview, this TreeView control appears in the toolbox .
DownInfo.aspx.vb:
Imports system.configuration
Imports system.data
Imports system.data.sqlclient
Imports Microsoft.Web.ui.WebControls
Public Class DownInfo
Inherits System.Web.ui.page
Protected withevents datagrid1 as system.Web.ui.WebControls.DataGrid
Protected Withevents TreeView1 as Microsoft.Web.ui.WebControls.treeView
Protected Withevents Label2 As System.Web.ui.WebControls.Label
Protected Withevents label3 as system.web.ui.webcontrols.label
Protected Withevents ListBox1 As System.Web.ui.WebControls.listbox
Protected Withevents Form1 As System.Web.ui.htmlControls.htmlform
#Region "The code" of the web form designer "
'This call is required for the web form designer.
End Sub
Private sub page_init (byval sender as system.object, byval e as system.eventargs) Handles mybase.init
'Codegen: This method call is necessary for the web form designer
'Don't modify it using the code editor.
InitializationComponent () End Sub
#End region
DIM DOWNDV As New DataView ()
DIM STRNAME AS STRING
Private Sub Page_Load (Byvale AS System.Object, Byval E AS System.Eventargs) Handles MyBase.Load
'
Strname = Request.QueryString ("strname")
'Instantiate a DownWebService
DIM WS as new downws.downwebservice ()
DIM DSTREE AS Dataset
'Get all categories
DSTREE = ws.getdownloadclass
'Pack in the tree structure
TreeView1.nodes.clear ()
DIM ROW AS DATAROW
For each row in dstree.tables (0) .rows
Dim item as new treenode ()
Item.text = row.item ("classname"). Tostring
'When you click on the URL to jump
item.navigateURL = "Downinfo.aspx? Strname =" & rotion.Item ("classname"). Tostring
'Picture of each branch
item.imageurl = resolveurl (me.templatesourcedirectory & "/tree.jpg")
TreeView1.nodes.Add (item)
NEXT
'Get all download information, after the classification is filtered, fill it to DataGrid
Downdv = ws.getdownfo (). Tables (0) .defaultView
IF strname <> "" ""
Downdv.rowfilter = "classname = '" & strname & "'"
END IF
DataGrid1.datasource = Downdv
DataGrid1.databind ()
End Sub
Private sub DataGrid1_Selected Indexchanged (Byval e as system.EventArgs) Handles DataGrid1.Selected IndexChanged
'Get the current ID
DIM NID AS INT32 = DataGrid1.SelectedItem.cells (0) .Text
'Get URL
DIM STRURL AS STRING = "Downdetail.aspx? Id =" nid.toString ()
'Open a window, no toolbar, status bar
